ems-core v1.0.0: Standard EMS platform core

Shared backend + frontend for multi-customer EMS deployments.
- 12 enterprise modules: quota, cost, charging, maintenance, analysis, etc.
- 120+ API endpoints, 37 database tables
- Customer config mechanism (CUSTOMER env var + YAML config)
- Collectors: Modbus TCP, MQTT, HTTP API, Sungrow iSolarCloud
- Frontend: React 19 + Ant Design + ECharts + Three.js
- Infrastructure: Redis cache, rate limiting, aggregation engine

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/app/models/energy_strategy.py

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+from sqlalchemy import Column, Integer, String, Float, Boolean, DateTime, ForeignKey, JSON, Date
+from sqlalchemy.sql import func
+from app.core.database import Base
+
+
+class TouPricing(Base):
+    """分时电价配置 (Time-of-Use pricing)"""
+    __tablename__ = "tou_pricing"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(200), nullable=False)
+    region = Column(String(100), default="北京")
+    effective_date = Column(Date)
+    end_date = Column(Date)
+    is_active = Column(Boolean, default=True)
+    created_by = Column(Integer, ForeignKey("users.id"))
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+
+class TouPricingPeriod(Base):
+    """分时电价时段 (TOU pricing periods)"""
+    __tablename__ = "tou_pricing_periods"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    pricing_id = Column(Integer, ForeignKey("tou_pricing.id", ondelete="CASCADE"), nullable=False)
+    period_type = Column(String(20), nullable=False)  # sharp_peak, peak, flat, valley
+    start_time = Column(String(10), nullable=False)  # HH:MM
+    end_time = Column(String(10), nullable=False)  # HH:MM
+    price_yuan_per_kwh = Column(Float, nullable=False)
+    month_range = Column(String(50))  # e.g. "1-3,11-12" for winter, null=all
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class EnergyStrategy(Base):
+    """能源优化策略"""
+    __tablename__ = "energy_strategies"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(200), nullable=False)
+    strategy_type = Column(String(50), nullable=False)  # heat_storage, load_shift, pv_priority
+    description = Column(String(500))
+    parameters = Column(JSON, default=dict)
+    is_enabled = Column(Boolean, default=False)
+    priority = Column(Integer, default=0)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+
+class StrategyExecution(Base):
+    """策略执行记录"""
+    __tablename__ = "strategy_executions"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    strategy_id = Column(Integer, ForeignKey("energy_strategies.id"), nullable=False)
+    date = Column(Date, nullable=False)
+    actions_taken = Column(JSON, default=list)
+    savings_kwh = Column(Float, default=0)
+    savings_yuan = Column(Float, default=0)
+    status = Column(String(20), default="planned")  # planned, executing, completed
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+
+class MonthlyCostReport(Base):
+    """月度电费分析报告"""
+    __tablename__ = "monthly_cost_reports"
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    year_month = Column(String(7), nullable=False, unique=True)  # YYYY-MM
+    total_consumption_kwh = Column(Float, default=0)
+    total_cost_yuan = Column(Float, default=0)
+    peak_consumption = Column(Float, default=0)
+    valley_consumption = Column(Float, default=0)
+    flat_consumption = Column(Float, default=0)
+    sharp_peak_consumption = Column(Float, default=0)
+    pv_self_consumption = Column(Float, default=0)
+    pv_feed_in = Column(Float, default=0)
+    optimized_cost = Column(Float, default=0)
+    baseline_cost = Column(Float, default=0)
+    savings_yuan = Column(Float, default=0)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())